Multipath device pseudo name to logical volume mapping for host devices
An apparatus comprises a host device comprising at least one processor coupled to memory. The host device is configured to communicate over a network with a storage system comprising a plurality of storage devices. The host device is further configured to identify a logical volume identifier corresponding to a given logical volume of the storage system and to submit a message comprising an indication of the logical volume identifier to a messaging system. The host device is further configured to obtain, from the messaging system, an indication of a pseudo name corresponding to the logical volume identifier and to assign the obtained pseudo name to a multipath device corresponding to the given logical volume, the multipath device comprising a plurality of paths between the host device and the given logical volume.
1. An apparatus comprising:
a host device comprising at least one processor coupled to memory, the host device being configured to communicate over a network with a storage system comprising a plurality of storage devices, the host device being further configured:
to identify a logical volume identifier corresponding to a given logical volume of the storage system;
to submit a message comprising an indication of the logical volume identifier to a messaging system;
to obtain, from the messaging system, an indication of a pseudo name corresponding to the logical volume identifier; and
to assign the obtained pseudo name to a multipath device corresponding to the given logical volume, the multipath device comprising a plurality of paths between the host device and the given logical volume.
2. The apparatus of claim 1 wherein the apparatus further comprises:
a second host device comprising at least one processor coupled to memory, the second host device configured to communicate over the network with the storage system, the second host device being configured:
to identify the logical volume identifier corresponding to the given logical volume of the storage system;
to submit a second message comprising an indication of the logical volume identifier to the messaging system;
to obtain, from the messaging system, an indication of the pseudo name corresponding to the logical volume identifier; and
to assign the obtained pseudo name to a second multipath device corresponding to the given logical volume, the second multipath device comprising a second plurality of paths between the second host device and the given logical volume.
3. The apparatus of claim 1 wherein:
the messaging system comprises a subscription-based messaging system; and
the host device is further configured to subscribe to the messaging system.
4. The apparatus of claim 3 wherein:
the messaging system comprises a plurality of topics; and
the host device being configured to subscribe to the messaging system comprises the host device being configured to subscribe to a topic of the plurality of topics that corresponds to the host device.
5. The apparatus of claim 4 wherein submitting the message to the messaging system comprises publishing the message to a given topic of the plurality of topics that corresponds to a management system, the management system being subscribed to the given topic and configured to obtain the published message from the messaging system based at least in part on the subscription to the given topic.
6. The apparatus of claim 5 wherein:
the management system comprises a mapping data structure, the mapping data structure comprising a plurality of entries, a given entry of the plurality of entries corresponding to the logical volume identifier and comprising the pseudo name corresponding to the logical volume identifier; and
the management system is configured to obtain the pseudo name from the given entry based at least in part on the indication of the logical volume identifier found in the obtained published message.
7. The apparatus of claim 6 wherein:
the message comprises an indication of the host device; and
the management system is further configured to publish a response to the topic of the plurality of topics that corresponds to the host device based at least in part on the indication of the host device included in the message, the response comprising an indication of the pseudo name corresponding to the logical volume identifier obtained from the given entry in the mapping data structure.
8. The apparatus of claim 5 wherein the host device is further configured:
to identify a second logical volume identifier corresponding to a second logical volume of the storage system;
to publish a message comprising a second indication of the second logical volume identifier to the given topic of the plurality of topics of the messaging system that corresponds to the management system;
to obtain, from the management system via the messaging system, an indication that a pseudo name corresponding to the second logical volume identifier does not yet exist in the management system;
to assign a second pseudo name to a multipath device corresponding to the second logical volume, the multipath device corresponding to the second logical volume comprising a plurality of paths between the host device and the second logical volume; and
to publish a third message comprising the second indication of the second logical volume identifier and an indication of the second pseudo name to a topic of the messaging system to which the management system is subscribed.
9. A method comprising:
identifying, by a host device comprising at least one processor coupled to memory, a logical volume identifier corresponding to a given logical volume of a storage system;
submitting, by the host device, a message comprising an indication of the logical volume identifier to a messaging system;
obtaining, by the host device, from the messaging system, an indication of a pseudo name corresponding to the logical volume identifier; and
assigning, by the host device, the obtained pseudo name to a multipath device corresponding to the given logical volume, the multipath device comprising a plurality of paths between the host device and the given logical volume.
10. The method of claim 9 wherein the method further comprises:
identifying, by a second host device comprising at least one processor coupled to memory, the logical volume identifier corresponding to the given logical volume of a storage system;
submitting, by the second host device, a second message comprising an indication of the logical volume identifier to the messaging system;
obtaining, by the second host device, from the messaging system, an indication of the pseudo name corresponding to the logical volume identifier; and
assigning, by the second host device, the obtained pseudo name to a second multipath device corresponding to the given logical volume, the second multipath device comprising a plurality of paths between the second host device and the given logical volume.
11. The method of claim 9 wherein:
the messaging system comprises a subscription-based messaging system; and
the method further comprises subscribing, by the host device, to the messaging system.
12. The method of claim 11 wherein:
the messaging system comprises a plurality of topics; and
subscribing to the messaging system comprises subscribing to a topic of the plurality of topics that corresponds to the host device.
13. The method of claim 12 wherein submitting the message to the messaging system comprises publishing the message to a given topic of the plurality of topics that corresponds to a management system, the management system being subscribed to the given topic and configured to obtain the published message from the messaging system based at least in part on the subscription to the given topic.
14. The method of claim 13 wherein:
the management system comprises a mapping data structure, the mapping data structure comprising a plurality of entries, a given entry of the plurality of entries corresponding to the logical volume identifier and comprising the pseudo name corresponding to the logical volume identifier; and
the management system is configured to obtain the pseudo name from the given entry based at least in part on the indication of the logical volume identifier found in the obtained published message.
15. The method of claim 14 wherein:
the message comprises an indication of the host device; and
the management system is further configured to publish a response to the topic of the plurality of topics that corresponds to the host device based at least in part on the indication of the host device included in the message, the response comprising an indication of the pseudo name corresponding to the logical volume identifier obtained from the given entry in the mapping data structure.
16. The method of claim 13 wherein the method further comprises:
identifying a second logical volume identifier corresponding to a second logical volume of the storage system;
publishing a message comprising a second indication of the second logical volume identifier to the given topic of the plurality of topics of the messaging system that corresponds to the management system;
obtaining, from the management system via the messaging system, an indication that a pseudo name corresponding to the second logical volume identifier does not yet exist in the management system;
assigning a second pseudo name to a multipath device corresponding to the second logical volume, the multipath device corresponding to the second logical volume comprising a plurality of paths between the host device and the second logical volume; and
publishing a third message comprising the second indication of the second logical volume identifier and an indication of the second pseudo name to a topic of the messaging system to which the management system is subscribed.
17. A computer program product comprising a non-transitory processor-readable storage medium having stored therein program code of one or more software programs, wherein the program code, when executed by a host device that is configured to communicate over a network with a storage system comprising a plurality of storage devices, causes the host device:
to identify a logical volume identifier corresponding to a given logical volume of the storage system;
to submit a message comprising an indication of the logical volume identifier to a messaging system;
to obtain, from the messaging system, an indication of a pseudo name corresponding to the logical volume identifier; and
to assign the obtained pseudo name to a multipath device corresponding to the given logical volume, the multipath device comprising a plurality of paths between the host device and the given logical volume.
18. The computer program product of claim 17 wherein the program code, when executed by a second host device that is configured to communicate over a network with the storage system, causes the second host device:
to identify the logical volume identifier corresponding to the given logical volume of the storage system;
to submit a second message comprising an indication of the logical volume identifier to the messaging system;
to obtain, from the messaging system, an indication of the pseudo name corresponding to the logical volume identifier; and
to assign the obtained pseudo name to a second multipath device corresponding to the given logical volume, the second multipath device comprising a second plurality of paths between the second host device and the given logical volume.
19. The computer program product of claim 17 wherein:
the messaging system comprises a subscription-based messaging system comprising a plurality of topics;
the program code further causes the host device to subscribe to a topic of the plurality of topics that corresponds to the host device;
wherein submitting the message to the messaging system comprises publishing the message to a given topic of the plurality of topics that corresponds to a management system, the management system being subscribed to the given topic and configured to obtain the published message from the messaging system based at least in part on the subscription to the given topic.
20. The computer program product of claim 19 wherein:
the management system comprises a mapping data structure, the mapping data structure comprising a plurality of entries, a given entry of the plurality of entries corresponding to the logical volume identifier and comprising the pseudo name corresponding to the logical volume identifier;
the management system is configured to obtain the pseudo name from the given entry based at least in part on the indication of the logical volume identifier found in the obtained published message;
the message comprises an indication of the host device; and
the management system is further configured to publish a response to the topic of the plurality of topics that corresponds to the host device based at least in part on the indication of the host device included in the message, the response comprising an indication of the pseudo name corresponding to the logical volume identifier obtained from the given entry in the mapping data structure.